Valve-truing device



oct. 7, 1924. y 1,510,812

A. L. WEINERT, JR., ET AL VALVE TRUING VDEVSICE Filed Nov. 12. 1921 WTNESSES: I yEQVTO A TTORNEY,

Patented @et 7, 1924.

UNITED PATENT FFICE.

AUGUST L, WEINERT, JR., AND FRED TUKA, OF NEWARK, NEW JERSEY.

VALVE-'ravine DEVICE.

Application led November 12, 1921. Serial No. 514,453.

T0 all whom t may concern:

Be it known that we, AUGUST L. VEINERT, Jr., and FRED TURA, citizens of the United States, and residents of Newark, Essex County, New Jersey, have invented certain new and useful Improvements in Valve- Truing Devices, of which the following is a description.

Our invention relates to valve truing devices and more particularly to an improved device of this character for effectively and correctly dressing and truing the faces of poppet valves such as are ordinarily employed lin internal combustion engines, so that such faces will be perfectly concentric with the stems of the valves and will eX- actly conform to the seats with which the valves are designed to cooperate.

It is also an object Vof our invention to provide in a device of the character indicated an improved construction and arrangement for centering a valve to be trued and for maintaining the valve correctly centered in the device throughout the truing or dressing operation.

Our invention further resides in a novel arrangement for securing a valve in a device of this character, which preferably includes the means for effecting relative rotation of the valve and the `cutters for dressing and truing such valve.

A further object of the present invention is to provide a valve truing device in which certain of the parts are replaceable 'to adapt the device to operate on valves of various sizes and shapes and having stems of varying diameters.

Other objects and features of the invention reside in the combinations and arrangements of parts and in the details of construction hereinafter more fully described and claimed.

ln order that our invention may be more clearl;7 understood, attention is directed to the drawing accompanying and forming a part of this specification, and in which:

Figure l is a vertical longitudinal rsectional view, partly in elevation, of a valve truing device comprising a` preferred embodiment of our invention, with a valve to be trued or refaced operatively mounted therein;

Fig. 2 is a view in end elevation, partly in section, looking from the left in Fig. l, the valvebeing omitted; and

F igs. 3 and 4 are enlarged detail views in elevation, partly in section, showing two different forms of the valve engaging pin or stein, carried by the means for 'adjusting the valve to regulate the cut and for maintaining the valve being trued centered in the device.

Referring to the drawing, the valve truing device illustrated therein comprises a base or frame l having vertical brackets or standards 2 and 3 at its endsrespectively. The standard 2 is provided at its upper end with a hollow frusto-conical cutter head 4, preferably formed integrally therewith, the inner smaller end of the Vhead facing the' standard 3 and having a circular opening 5. The cutting means for the valves to be trued and refaced comprises a plurality of blades or knives 6, which are rigidly secured in suitable guides 6 provided on the inner conical surface of the head 4 as by means of screws 7. There are preferably live of these blades and the same are preferably equi-spaced and arranged at an angle of either 45 degrees or 60 degrees with respect to the axis of the cutter head 4. The blades 6 are positioned and ground very accurate-ly so that corresponding points in the cutting edges thereof will tbe equi-distant from the axis of the head 4, the blades also being arranged with their cutting edges extending substantially radially with respect to said axis. An arm 8 is pivotally mounted at 9 at one side of the outer large end of the cutter head and is adapted to extend across said end, as shown, said arm being provided at its free end with a notch l() adapted to be engaged with the shank of a screw or stud 1l carried by the head 4 at a point diametrically opposite the pivot 9. A rod 12 is threaded through the arm 8 substantially midway between the ends thereof and at such a point that when the ar-m is positioned as shown, with its notch lO engaging the stud l1, the axis of the rod will eX-- actly coincide with vthe vaxis of the cutter headand also with the axis of the valvev `chuck or holding means which will presently be described.4 The rod l2 has a handle tra 13 at its outer end whereby the rod may be turned to adjust it. The inner` end portion of rod 12 is provided with a `coaxial cylindrical recess in which a cylindrical pin or stem 14 is mounted. lhile the stem 14 lits closely in the recess in rod 12 it is free to rotate therein. This stem extends some distance from the rod 12, and its outer end 15 is conical and is adapted to engage and tit the central conical recess usually provided in the heads of poppet valves for internal combustion engines. rlhe inner end of the pin or stem 14 is provided with a spherical recess or ball socket and a ball 16 is rotatably mounted within said recess and protrudes therefrom slightly so as to engage the bottom of the recess in the rod 12, an anti-friction ball thrust bearing thus being provided for the stem or pin. The portion of the stem adjacent the ball 16 is peaned over to retain the ball within its socket.

The ystandard 3 is provided at its upper end with a journal 17 preferably formed integrally therewith, the axis of this journal and the axis of the cutter head el being in exact alignment. A cylindrical shouldered sleeve 18 is slidably and rotatably mounted in the journal 17, the enlarged portion of the sleeve fitting quite closely within the journal, and a helical spring 19 surroui'iding the reduced portion of the sleeve within the journal, tends to move lthe sleeve to the left and to maintain the same in a position in which a collar 20 fastened to the sleeve at a point beyond the right-hand end of the journal, is in engagement with the latter. The collar 2O is adjustably secured to the sleeve 18 as by means of a set-screw 21. The sleeve 18 also extends from the journal 17 towards the cutter head 1, and is provided at its lefthand end with an outer flange 22 and with an outwardly flaring conical enlargement L3 of its bore. A radial opening 24 provided in the sleeve 187 is adapted to be engaged by the inner end of a stem 25 slidably mounted in an opening-extending radially through the journal 17, saidstem having a pin and slot connection 26 with the journal for limiting the movement thereof, and being normally held in its uppermost position out of engagement with the opening 24; by means of a coiled spring 27 which embraces the stem between the head thereof and the journal 17. Disposed and fitting fairly closely within the sleeve 18 is a tubular draw-cl'iuck 28. The draw-chuck 28 is provided at its inner left-hand end with a conical enlargement 29, which conforms to the conical enlarge-ment 23 of the bore of sleeve 18 and is adapted to coact therewith to rigidly secure a. valve to be trued in proper position in the device as will presently appear. In order to providethe chuck 28 with resilient jaws, the same is longitudinally kerfed, as indicated at 80. Reference character 81 represents crank or handle provided with a hub 82 which has a screwethreaded connection with the right-hand end portion of the chuck 28 extending from the sleeve 18. inserted within the draw-chuck 28 fro-1n the left-hand end thereof is a removable and interchangeable cylindrical adapter or fill-in chuck 88; the latter being provided with an end flange to limit the distance the same may be pushed into the chuck 28, and being longitudinally kerfed as indicated at 8st, to provide resilient jaws. lVhen a valve to be trued is mounted in the device, its stem or shank is received and held in the fill-in chuck The stem of the valve should lit snugly within the adapter chuck 88, and accordingly a number of these chucks having different internal diameters are preferably provided for each truing device to adapt the latter for use with valves having stems of dierent diameters. It will be apparent that an adapter chuck may be selected which will lit closely the stem of any valve to be dressed, and consequently that the valve may be very acn curately centered in the valve holding means comprising the sleeve 18, draw-in chuck 28 and fill-in chuck 88.

Reference character represents an ordinary form of poppet valve such as generd ally used in internal combustion engines, this valve having the usual cylindrical stem 36. In mounting this valve in our truing device or tool, the arm 8 is thrown back around its pivot 9, and in case the draw-in chuck 28 and adapter chuck 33 have not already been released from their respectivi.= frictional locking engagement with the sleeve 18 and chuck 28, lthis is accomplished by engaging the stem with the opening 24 in sleeve 18 to hold the latter against rotation and then, while holding the stem thus engaged against the action of spring 27, turning the handle 31 in an anti-clochwise direction on the outer 'threaded end portion of the chuck 28. lWhen the chucks 28 and 83 are thus released their resilient jaws will expand and assume their normal positions. The stem 3G of the valve is then shoved into the cutter head from the outer end thereof, through the ojiiening 5 and into the adapter chuck 83 until the head of the valve is positioned within the cutter head with the face thereof to be dressed and trued in engagement with the blades 6. rl`he arm 8 is then moved back about pivot 9 to its former position with the notch 10 thereof engaging the pin ll, whereupon the rod 12 is turned by its handle 13 until the conical end 15 of the stem or pin 1e carried thereby engages the usual central conical recess in the head of the valve The parts now being in the position shown in Fig. 1, the valve 35 is rigidly secured in its mounting, comprising the itil) lll) lit)

lli

sleeve 18, and chucks 28 and 33, this being accomplished by merely turning the handle 31 in a clockwise direction on the outer threaded end portion of the chuck 28 while maintaining the stem in engagement with the opening 24 in sleeve 18 to ho-ld the latter against rotation. On thus turning the handle 31, the hub 32 thereof, because of its threaded connection with the chuck 28, c-oacts with the adjacent end of sleeve 18 to move said chuck to the right in the sleeve. In such movement of the draw-in chuck 28, the wall of the enlarged conical end portion 23 of the bore of sleeve 18 coacts with the conical enlargement 29 of chuck 28 to contract the resilient jaws of the latter, which in turn contract the resilient jaws 0f the fill-in chuck 33 into firm gripping engagement with the valve stem 36. The valve will then be rigidly secured in its mounting. But a slight turning' of the handle 31 relative to the chuck 28, is necessary either to secure the valve in its mounting or to effect the release of the gripping engagement of the fill-in chuck 33 with the valve stem so as to permit the valve to be removed from the device.

`When the valve has been rigidly secured in its mounting, as above described, pressure is removed from the stem 25 and the spring 27 will thereupon act to disengage the stem from the opening 24 in sleeve 18. Turning of the handle 31v will now effect rotation of the valve mounting comprising sleeve 18 and chucks 28 and 33, together with the valve 35'about the axis of journal 17, and such rotation of the valve will, of course, result in the cutting or dressing of the face thereof to be trued by the stationary blades 6. The extent to which the face of the valve is dressed or cut away, as well as th-e dep-th of the cut, may be nicely regulated by adjustment of the rod 12, for the further the rod is screwed inwardly throughl the arm 8 the further the valve will be mov-ed to the right towards the blades 6 in opposition to the action of the spring pressure on the spring-pressed mounting for the valve. In this connection, it will be seen that as the rod 12 is screwed inwardly and the valve forcedto the right thereby, the chucks 28 and 33 and sleeve 18 will also be moved to the right in the journal 17, such movement being permitted but opposed by the spring 19. It will also be apparent that the spring will act through the valve mounting to yieldingly but firmly maintain the valve in engagement with the centering pin 14 carried by the rod 12, and that the said pin and the valve mounting will act to maintain the valve accurately centered in the device, that is, in exact axial alignment with the cutter head 4, throughout the dressing and truing operation. The effective spring-'pressure on vthe valve mounting may be regulated by adjustment of the position of collar 20 on the sleeve 18.

As the valve 35 is rotated, the pin 14 by reason of its engagement with the conical recess in the center ofthe valve head, will also be rotated in the rod 12. The provision of the p-in 14 with the ball-thrust pivot 16, however, reduces the friction between the pin 14 and rod 12l to a minimum. The heads of po-ppet valves for internal combustion engines are sometimes provided with small central convex projections in` stead of with central conical'recesses, and when such a valve is to be trued, the centering pin 14, shown in Figs. 1 and 3, is replaced by a centering pin 14, such as shown` in Fig. 4, having a head 15 provided with a concave recess 15 formed to take over and snugly iit the central convex projection on the head of the valve.

A feature of our invention which is of considerable importance, resides in the provision of a single member, viz, the handle 31, for eilfectingrotation of the valve with respect to the cutter head during the truing operation and also for effecting or control-A ling the securing of the valve firmly in the mounting therefor and the releasing `of the valve therefrom.

In order to enable the operator to view the cutting of the valve from above during the truing operation and to properly regulate the same by adjustment of the rod 12, the upper part of the wa-ll of the frus'to-conical cutter head 4 is provided with a pair of fairly large openings O extending therethrough.

Vhile we have shown and described the preferred embodiment of our improved valve truing device, it is to be understood that such embodiment is subject to various modications and changes in the size, shape and arrangement of parts without departing from the spirit of the invention or the scope of the appended claims.

Having now described our invention, what we claim and desire to protect by Letters Patent f is as follows:

1. In a device of the class described, a cutter head, means comprising a member adapted to coact with a valve mounted in the device and adjustable to move said valve against the cutting means of said head,l and a spring-pressed mounting in which the valve is adapted to be secured and which is adapted to yieldingly hold the valve firmly in engagement with said member, said mounting comprising means adapted to rigidly hold the valve in the mounting.

2. In a device of the class described, a cutter head, means comprising a member adapted to coact with a valve mounted in the device and adjustable to move said valve against the cutting means of said head, and 'a spring-pressed mounting in which the valve is adapted to be secured and which is adapted to yieldingly hold the valve` firmly in engagement with said member, said mounting comprising means adapted to rigidly hold the valve in the mounting, and said cutter head and mounting being relatively rotatable.

8. In a device of the class described, a cutter head, means comprising a member adapted to coact with a valve mounted in the device and adjustable to move said valve against the cutting means of said head, a spring-pressed mounting in which the valve is adapted to be secured and Which is adapted to yieldingly hold the valve firmly in engagement With said member, said mounting comprising means adapted to rigidly hold the valve in the mounting, and means adjustable to vary the effec-tive spring-pressure on said mounting.

d. In a device ot the class described, a cutter head, spring-pressed means adapted to grip the stem of a puppet valve to be trued and hold the valve in a position ivith its head in operative relation to the cutting means of said cutter head, and means adapted to coac't with the head of such valve and adjustable to force said head towards said cutting means against the action ot the springpressure acting on said gripping means.

5. In a device of the class described, valve cutting means, a valve mounting, and unitary means for etiecting the securing ot a valve in said mounting and tor effecting relative rotation ot said valve mounting and said cutting means.

6. A valve truing device of the class described, comprising a cut-ter head, a valve mounting comprising means :tor rigidly holdingv a valve therein, said cutter head and valve mounting being relatively rotatable, and means for maintaining' a valve accurate ly centered in the device during the truing operation including said mounting and also including a member adjustable to regulate the position of the valve ivith respect to said head.

7. A valve truing device of the class .lescribed7 comprising a cutter head, a valve mounting comprising means for rigidly holding a valve therein, said cutter head and valve mounting being relatively rotatable, and means for maintaining a valve accurate ly centered in the device during the truing operation including said mounting and also including a member adjustable to regulate the position of the valve With respect to said head, said cutter head, valve mounting and member being in axial alignment during said truing operation.

8. In a device of the class described, a cutter head, a rotatable valve mounting comprising means .tor rigidly holding a valve therein, and means for adjusting a valve carried by said mounting With respect to said head comprising an adjustable member, a valve engaging member rotatable with respect to said adjustable member, and an anti-friction bearing between said members.

9. In a device of the class described, a cutter head, a rotatable valve mounting comprising means for rigidly holding a valve therein, and means for adjusting a. valve carried by said mounting with respect to said head comprising an adjustable rod, a member rotatably mounted in said rod and extending therefrom and a ball thrust bearing between said member and said rod.

10. In a device ot the class described, a cutter head,y a rotatable valve mounting adapted to hold a valve in operative relation to said head, and unitary means Jfor eiecting the securing of a valve in said mounting and for rotating the latter.

11. In a device ot the class described, a cutter head, a rotatable valve mounting adapted to hold a valve in operative relation to said head, and unitary means tor effecting the release of a valve 'from said mounting and for rotating the latter.

l2. In a device of the class described, a critter' head, a rotatable valve mounting adapted to hold a valve in operative relation to said head, and unitary means for effecting the securing of a valve in said mounting, Yfor e'ecting the release ot the valve trom said mounting, and for rotating the mountmg.

13. A valve truing device of the class described, comprising a cutter head, a valve mounting comprising means for rigidly holding a valve therein, and means tor maintaining a valve accurately centered in the device during the truing operation includ-- ing said mounting and also including a member adjustable to regulate the position ot the valve with respect to said head, said mounting being spring-pressed to yieldingly hold the valve firmly in engagement ivith said adjustable member during the truing operation.

le. A valve truing device of the class described, comprising a cutter head, a valve mounting conipiiising means for rigidly holding a valve therein, and means for maintaining a valve accurately centered in the device during the truing operation including said mounting and also including a member adjustable to regulate the position of the valve with respect to said head, said cutter head, valve mounting and member being in axial alignment during said truing operation, said mounting being spring pressed to yieldingly hold the valve firmly in engagement With said adjustable member du-ring the truing operation.

I5. In a valve truing device of the class described, a cutter head, a valve mounting tor holding a valve in, operative relation to IUS said head comprising a rotatable sleeve, valve chuck means carried by said sleeve and movable relatively thereto to secure a valve in the mounting and to release the valve, means for holding said sleeve against rotation, and means adapted upon actuation thereof When said sleeve is held against rotation, to eect such movement of the chuck means relative to the sleeve.

16. In a valve truing device of the class described, a cutter head, a rotatable valve mounting for holding a valve in operative relation to said head comprising an outer sleeve, valve chuck means mounted in said` sleeve and movable axially With respect thereto to secure a valve in the mounting and to release the valve, means for holding the sleeve against rotation, and means adapted When said sleeve is held against rotation to effect such axial movement of the chuckv means. y

17. In a valve t-ruing device of the class described, a cutter head, a rotatable valve mounting for holding a valve in operative relation to said head comprising an outer sleeve, valve chuck means mounted in said sleeve and movable axially With respect thereto to secure a valve in the mounting and to release the valve, means for holding the sleeve against rotation, and means adapted When said sleeve is held against rotation to effect such axial movement of the chuck means, said chuck means comprising an outer chuck and an adapted chuck removably and replaceably mounted Within said outer chuck.

18. In a valve truing device of the class described, a cutter head, a rotatable valve mounting for holding a valve in operative relation to said head comprising an outer sleeve, valve chuck means mounted in said sleeve and movable axially with respect thereto to secure a valve in the mounting and to release the valve, means for holding the sleeve against rotation, and means adapted when said sleeve is held against rotation to effect such axial movement of the chuck means, said chuck means comprising an outer chuck and an adapter chuck removably and replaceably mounted Within said outer chuck, said chucksv having resilient jaws.

This specification signed this 10th day of November, 1921. f

AUGUST L. WEINERT, JR. FRED TUKA. 

